Aeroplane safety device



Sept', 1929. L. BLUMENTHAL 1,727,157

AEROPLANE SAFETY DEVICE Filed Aug. 22, 192'? sheets-sheet 2 ATTORN EYS Patented Sept. 3, 1929..

UNITED ASTA Louis BLUMENTILAL, or BzaooxLYN, nawl Yonx.

.AEBOPLANE SAFETY DEVICE Application mea mgm 2a, 1927.` semi No, 214,598. I

This invention relates. to a satetydevice Afor aeroplanes which is brought luto action by the operator when it isdesired to descend and itincludes. auxiliary wings extending' rom'the upper wings whereby the shock oli landing is neutralized by the increased wing area coacting under the wings.

An object ofthe invention is to provide a air of auxiliary wings made of tenacious fa ric which lare practically housed or concealed under. the upper wings e'ther by automatically winding them on spring rollers or sliding them in a rectilinear path to fold under t-he wings;

Another object of the invention is to provide means for preventing upward throw of the auxiliary wings when they are in action and a rock lever connected to themeans whereby both the wings are simultaneously actuated to move them out oi action.

Another object of the invention is to provide lexiblemeans within reach of the operator for preventing the auxiliary wings when in their extended position from moving backward by the action of a s ring connected to the retracting devices o the auxiliary wings.

the novel combinations hereinafter described and claimed, reference being made to the accompanying drawings in which:

Fig. 1 represents a side elevation of an aeroplane embodying this invention.

Fig. 2 is a front view of the same.

Fig. 3 is a longitudinal section of a spring roller on a larger scale.

Fig. l is a view'similar to Fig. 1 showing the method of folding the auxiliary wings.

Fig. 5 is a horizontal section taken along the line 5-5-oi Fig. 4.

In the drawings the numeral 6 designates a fuselage having upper wings 7 and lower wings 8 connected together by means of vertical struts 9 as is well known. The invention is shown applied to a byplane but it will be seen that it could be connected to anytype of winged plane. The safety device for checking the shock of landing the aeroplane comprehends a .pair of auxiliary wings 10 which when in action extend beyond the forward and rear portions of the upper wings as indicated in-Fig. 1. The wings are preferably made of tough canvas or other suitable material to withstand therair pressure and vof the upper wings.

'th the pressure ofthe airv is angular and forms a'rod extending into hen retracted or out of actionl The invention resides more particularly in they or areilexible to permit them to be wound folded when out of action. Both' wings are alike and each'is 4wound on a roller 11 provided with gudgeons 12 Jfor engagement with brackets 14 secured to the under side One of the gudgeons a socket 15 located in-one end ofthe' roller as indicated in Fig. 3. A ciled sprinv 16 1s mounted ou the rod so that it will w-inc when the wing is moved outward and unwind to pull it back. a A

The forward end of theauxiliary wing is fixe-d to a har`17 projecting beyond each side of thawing and slotted link members 18 coac't with the'ends of the bar. The lower end of each link is keyed to a-rockshaft 19 which y Q() secured to the is mounted in hearings struts and aslever 211is adapted to actuate the rock shaft. There yare two links fulcrum'ed to each of the rock shafts but a single leverQ-l connects each shaft with a pair-of the links and when the wing is extended the links forni braces to hold the wing in a fixed immovable position.

In order to prevent back throw of the wing when extended the hand grip of the rope is hooked to a nail or other device 26 within the reach of the operator. lt will readily, be understood that when the rope is unhooked rhecoiled spring lwill rotate the roller 11 thus winding the canvas wing thereon and the links move with the bar toward the edge of the upper wing. lVhen it.is desired to unwind both the canvas wings the rope is pulled so as to actuate both levers and the .tour links at the sametime while the unwinding ot the canvas rotates each roller 11 to wind its respective coiled spring.

As indicated in Figs. 4 and 5 the links, levers and rope connectionsare similar to those shown in Figs. 1' and 2, but instead of Winding the canvas on a spring roller itis folded to conceal it under the wing. This is accomplished by having one end 26 of each canvas wing secured to the under surface of the upper wing. The canvas is looped about a slide 27 and the other end is fastened to the bar 17 made to coact' witli the slotted links as stated above, The slide is guided on tracks 28 secured under the wing and coiled springs Each4 lever 21 has a flexible connection such as a rope 22 guided- 29 restore the slides tothe positions shown in Fig. 4 to fold the canvas wings. In -order to extend the canvas the bars are moved out- Ward awayfrom the end of the wings and the slides move therewith thereby unfolding the canvas. Modification of the invention can be made Within the law of equivalents and scope intendsto come down to the earth he has to standstill.

slacken the speed in order to stop or land at a desirable place, lie has to slacken down more and more until the propeller is actually at a This consequently makes the plane a dead weight compelling it to come down rapidly whereas, by building a plane with the auxiliary wings makes the plane safer and easier to land, forit is evident that when the operator finds it necessary to slacken ofi the power a few moments before landing all he has to do is to pull the auxilia wing extensions out from both sides thus ad ing a surface about as wide and as long as the plane itself which at the time being supported bythe air pressure below the wings is Just sufficient to make the plane glide down very sloW and'safe. In other words, the eX- r tensions act the same as a parachute but with a much greater advantage for in case of an accident the operator can readily actuate the auxiliary wings to check the gravity of the plane. I claim: l. In a safety device 4for aeroplanes the lcombination with awing, of a pair of spring rollers mounted under vthe wing, a flexible canvas auxiliary wing normally wound on each roller, a pair of links connected to eacli of the auxiliary wings, and each pair having a rock lever, and means for operating the rock levers to simultaneouslypull both auxiliary wings beyond the ends of thewing.

2. In a safety device for aeroplanes the combination with a wing, of a pair of spring rollers mounted under. the wing, aiflexible canvas 'auxiliary wing normally wound 'on' each roller, a pair of links connected to each spring rollers mounted under thawing,4 a lexible canvas auxiliary wing normally wound oneach roller, a pair of linksv connected to each ofl the auxiliary'wings} andy each pair 'having a rock lever, a rope connected to the rock'levers within reach of the o erator to simultaneously pull both of the' wings 'beyond the endsof'the wing, and means for fastening the rope to prevent backward movement of the auxiliary wings when extended. In testimony whereof Iphave hereunto set m hand. y y LOUIS BLUMENTI-IAL.

-the combination with awing, of a pair of 

